Lock



E. N. JACOBI Aug. 2, 1932.

. LOCK Filed Dec. 19, 1928 uuuulgA 'Patented i UNITED' STATES Pallarrlf OFFICE Enwnb N.' sacem'. or' aanname, wisconsin, .assienuifro sarees e s'rmrron .conrona'rrom or mwaum, wisconsin, a concurren or nmwm LOCK ' Appunti@ mea-'December 19, 192s. .snainamssa This invention relates to certain new and useful improvements 1n locks andhas as one of its .objects the provision of means for rendering its defeat-,by picking more diicult. I4 Anotherv object of this .invention resides in the provision of'a lock iniwhich means are provided to necessitate movement of the look cylinder longitudinally before can b eturned. 'A9 Another object of this invention resides in theprovisionofalockhaving a key controlled lock .cylinder provided with a lurality of locking tumblers, one of which unctionsas a stop to prevent actuation ofthe lock cyl- 1'5 inderuntil the same'has been longitudinally moved a predetermined distance. /And'a more specilic object of this inventionresides in the provision of a lock of the 'character described having a key controlled I@ lock cylinderprovided With a plurality of locking tumblers and rotatable in a mounting member one of' the locking tumblers being longer than the others to provide a stop which prevents actuation of the lock cylinder until 25 the same hasV been moved longitudinally.,

- With the above and other objects in view which will appear as the description proceeds, my invention resides in the novelvconstruction, combinationy and arrangement of 8c parts substantially as hereinafter described and more particularly defined by the appended claims',l it being understood that such changes in the recise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, l have illustrated one complete Aexample of the physical embodiment of my invention constructed according to the best mode l have so far devised ples thereof, and inwhich:

Figure 1 is a transverse, sectional view, through a lock embodying my invention with arts thereof in elevation;

illustratingthe lock cylinder as having been moved longitudinally and partially-turned a predetermined distance, said view .being taken through Figure Bon the plane ofthe line225 yfor the practical application of the princi- Figure 2 is a view similar to Figure 1.'I the others so that when the key 11 is inserted Figure 3 is a crosssectional view taken through Figure 2 on the plane of the line 3 3 with parts in elevation; Figure 4 is a view of the end of the lock barrel prior to 'its assembly with the lock cylinder and illustrating the several bores therein; I

Figure 5 is a perspective view of the end washer, and y Figure 6 is an elevational view of the spring which restrains longitudinal movement of the lock cylinder.

Referring vnow more particularly to the accompanymg-1 drawing, in which like numerals designate like parts throughout the several views, 5 represents the body or mount- -ing member of a lock lembodying my invention which has a central bore 6 to receive a lock cylinder 7. The bore 6 is provided with Y apair of diametrically opposed, longitudinal 70 channels 8 and -9 which receive the ends'of a vplurality of tumblers 10 to lock thecylinder against rotation in the conventional manner, the insertion of a proper key 11 retractlng .the tumbler's into the cylinder to permit its 7 5 actuation.

A second pair of diametrically opposed` longitudinal channels 12-are also formed in the bore 6 to permit theinsertion of a cap member 13 in the bore from its rear and which extends outwardly through a reduced bore 14 in the front face of the barrel. Outward movement therethrough is prevented by turnedover ends or lugs 15 formed on the cap which engage the shoulder formed by the reduced bore 14, the lugs 15 being :receivedl in the slots 8, 9 and 12 as the cap is inserted in the barrel. -The cap member 13 is adapted to receive the reduced forward end of the lock cylinder 7 which is provided with recesses 16 to receive the lugs 15 to tlnis'irnain`1 tain the same against rotation relatively to the cap.-

The rear-most tumbler 17 is longer than nally moving'the cylinder towards the rear The rear end of the bore 6 is provided witha pair of counterbores and 19 to receive a spring 21 and a washer 22, respectlvely.

" The spring 21 is received in the counterbore 19 which is the smaller of the two and is confined between a shoulder 23 formed by reducing the diameter of the adjacent portion of the lock cylinder, and the washer 22 wh'ch is disposed within the larger counterbore 20. The washer 22 engages the shoulder formed between the counterbores 19 and 2O and is there retained by spinning over the outermost end of the barrel 5, as at 24.

In order to provide the necessary enlarged annular channel or space into which the projecting end 18 of the tumbler 17 may be moved by longitudinally shifting the lock,

cylinder, to permit rotation thereof, half of the rear end of the barrel 5 is milled to the desired depth. This produces an eccentric bore 25 which extends through substantially one half of the circumference of the barrel and whose periphery is tangent with the counterbore 20 at its medial point. This method of providing the desired enlarged bore throughout but half of the circumference of the-barrel is utilized when the barrel is machined but when die cast it will'be readily apparent that it will be unnecessary to form an eccentric bore, as half of the counterbore 19 can be increased to the desired depth. This of course is impossible where machining is resorted to.

An actuator cam 26 is connected in any suitable manner with the rear-most end of the lock cylinder to impart movement to any desired mechanism, not shown, upon rotation of the lock cylinder.

From the foregoing description, taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art to which an invention of this character appertains, that I provide an improved lock construction which is so constructed that picking thereof is rendered considerably more difficult due to the fact that the lock cylinder must be moved longitudinally before rotation can be effected.

What I claim as my invention is:

1. In a lock f the character described including a barrel, a lock cylinder rotatable therein, said lock cylinder having a plurality of tumblers retractible upon the insertion of a proper key, one of said tumblers being longer than the others to at all times.

have a part disposed outwardly of the periphery of the lock cylinder to restrict rotation of the cylinder, and means into which the projecting end of said tumbler may be moved to permitv rotation of the cylinder.

2. In a lock of the character described in- Yvent rotation thereof, and means whereby longitudinal movement of the lock cylinder a predetermined distance moves the extended end of said tumbler into a channel to permit rotation of the cylinder in one direction.

3. In a lock of the character described including a barrel having a lock cylinder rotatable therein, said cylinder having a plurality of tumblers retractible by the inser-v tion of a proper key, one of said tumblers being of greater length than the other to have a portion at all times disposed beyond the periphery of the lock cylinder and normallyprevent rotation thereof, means whereby longitudinal movement of the lock cylinder a. predetermined distance moves the extended end of said tumbler into a channel to permit rotation of the cylinder in one direction, and means yieldably urging the lock cylinder against such longitudinal movement.

4. In a lock structure of the character dcscribed, a bored mounting member, a lock cylinder rotatable and longitudinally shiftable Within the bore of the mounting member, yieldable means normally restraining longitudinal shifting of the lock cylinder, a plurality of locking tumblers carried by the lock cylinder and engageable with an abutment carried by the mounting member in communication with its bore, said locking tumblers being retractible upon the insertion of a proper key, and one of the-tumblers being of greater length than the others whereby a portion thereof remains in engagement with the mounting member carried abutment after the insertion of the key, and said tumbler being disengageable from the mounting member carried abutment by longitudinal shifting of the lock cylinder.

5. In a lock structure of the character described, a bored mounting member, a lock cylinder rotatable and longitudinally shiftable therein, stop means at the forward end of the mounting member for preventing outward movement of the lock cylinder, means for closing the inner end of the mounting member, spring means confined between the means closing the inner end of the mounting member and the lock cylinder normally yieldably urging the cylinder into engagement with the stop means at the forward end 'of the mounting member, a plurality of locking tumblers carried by the lock cylinder normally yicldably engaged with an abutment carried by the mounting member in communication with its bore to releasably secure the lock cylinder against rotation,

um locking tumbler maybe moved to free the i said .tumblers being retractible upon the. in-

i sertion of a proper key, one of the tumblers lbeing of greater length than the others whereby a portion thereof-remains'in engagement with the mounting member car- 4 ried abutmentafter the insertion of the key,

and said Vmounting member having a chanv the mounting'member abutment to rest-rain .rotation of the "lock cylinder, said locking tumblers' being retractible by the insertion of nel communicating with the abutment and4 normally' disaligned -with the locking tumbler of greater length into which the said cylinder for rotation upon longitudinal shifting'of the lock cylinder inwardly with re- -spect to the mounting member'.

6. ln a lock structure of the character described, a mounting member having an abut- Ament, .a lock cylinder rotatable'and longitudinally shiftable therein, a plurality 'of locking tumblers carried by the 'lock cylinder and normally yieldably engaged with a proper key, and means whereby the lock cylinder is heldyagainst rotation after the -tumblers have been retracted until the cylinder is shifted longitudinally inwardly a pre-A determineddegree, said lock cylinder being longitudinally shiftable independently of the key.

7. ln a lock of the character described, in-

i cluding a mounting member, a lock cylinder i having a key slot, aplurality of locking turnblers carried by the lock cylinder, saidlock cylinder being movable in one direction angular' to the first Vmentioned direction independently of a key and being movable in another direction in the performanceofits locking function upon the retraction of the locking tumblers by the insertionv of a properkey,

' and means whereby one ofv said tumblers rection. Y

provides a stop to restrain actuation lof the lock cylinder in the performance 'of its locking function until movement of the cylinder hasy been effected in said first mentioned di- 18. In alock cluding a mounting member, a lock cylinder having a'key slot, a plurality of locking tumblers carried lby the lock cylinder and nor- 'mally' restrainin rotation of the lock cylinder, said lock cy inder being rotatable upon the retraction of the locking tumblers .by the insertion of a proper key and being longiand means whereby one of said tumblers protudinally shiftable independently of the key,

vides a 'stop to restrain'rotation of the lock cylinder until longitudinal. movement thereof has been effected. v In a lock vof the character described,'in' cludinga mounting member, la lock cylinder having a key slot, a plurality of locking tumblers carried by the .lock cylinder for re.

leasably securing the lock cylinder against rotation, said lock cylinderfbeing rotatable 'longitudinally of thelc'haracter described,'in

upon the. retraction-of the locking tumblers bythe insertion of a proper ke and being shiftable indepen ently of the key, means yieldably holding the lock cylinder against longitudinalshifting, and meansfor holding the lock cylinder against rotation' until it is shifted longitudinally a predetermined dista-nceo 10. ln a lock structure of the character described, a bored mounting'member having an annular abutment adjacent one end, a lock cylinder having al key slot and mounted within the mounting member` bore, a'plu'rality of locking tumblers carried bythe lock cylinder and engagea-ble with a longitudinal abutment carried by the mounting member' in communication ywith its bore to normally releasably lsecure the lock. cylinder against ro tation, said tumblers being retractible by the insertion of a preper key and the lock cylinder being longitudinally movable in the mounting member bore independently'of the key,means normally yieldably urging the lock cylinder longitudinally into engagement with the mounting member annular abutment, and means carried by the lock cylinder and engaging the longitudinal abutment in the mounting member to prevent rotation of the -lockcylinder until the cylinder has been shifted longitudinally away from the annular abutment and against its ur ing means.

1ll In a lock structure of the c aract'er described, a mounting member, a lock `cylinder by longitudinal shifting of the lock cylinder I is required in addition to the insertion of the proper key to free the lock cylinder for rotation.

ln testimony whereof l have hereunto affixed my signature.

EDWARD NJACOBI.

:au y

CERTIFICATE OF CRRECTION` Patent No. 1,869,426. August 2, 1932.

EDWARD N. Incom.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, lines 35v and 36, claim 7, strike out the words "angular to the first mentioned direction" and nsert the same to follow the Word "direction" in line 38, of same claim; and

that the said Letters Patent `should be read with this correction therein that the same may conform to the record of. the case in the Patent Office. Signed and sealed this 22nd day of NovembenA. D. 1932.l

M. J. Moore,

(Seal) I Acting Commissioner of`Patents. 

